Conservation status

Fifteen species of Drepanididae have become extinct within historical times, mostly from loss of habitat through deforestation and environmental degradation. By IUCN standards, seven living species are Critical, five are Endangered, and three are Vulnerable. Nevertheless, all species are threatened to various degrees by a combination of loss of habitat, the introduction of mosquito-borne diseases of Culex quinquefasciatus, especially avian malaria (Plasmodium spp.) and avian pox, along with competition from and predation by invasive species. The o'u, Oahu alauahio (Paroreomyza macu-lata), and Maui nukupuu (Hemignathus lucidus affinis) may be extinct, none having been seen for several years. At the very cliff-edge of extinction is the po'o-uli, of which only three individuals remain.

At the opposite end of the scale, the amakihis are the most widespread, populous, and successful honeycreepers; their total population, all species, is estimated at an impressive

870,000. The several subspecies were formerly found on all the major islands. The iiwi, fairly common on the major islands, has a total population estimated at 340,000.

0 0

Post a comment